Sigma Industries Inc. (TSXV:SSG), Canada's 25th largest Industrial products company by market cap, has plummeted 5.0c (10.3%) from its last trading session of March 20 to close at 43.50c. Compared with the S&P/TSX 60 Index which fell 7.8 points (0.9%) in the day, the relative price change was -9.4%. The fall was exacerbated by extraordinary volume of 4.6 times the average daily volume of 15,588 shares.